20403039 has 8 divisors (see below), whose sum is σ = 27717552. Its totient is φ = 13345280.

The previous prime is 20403023. The next prime is 20403073. The reversal of 20403039 is 93030402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20403039 - 2⁴ = 20403023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64002 + ... + 64319.

It is an arithmetic number, because the mean of its divisors is an integer number (3464694).

Almost surely, 2^20403039 is an apocalyptic number.

20403039 is a deficient number, since it is larger than the sum of its proper divisors (7314513).

20403039 is a wasteful number, since it uses less digits than its factorization.

20403039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128377.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 20403039 is about 4516.9723266808. The cubic root of 20403039 is about 273.2530091492.

The spelling of 20403039 in words is "twenty million, four hundred three thousand, thirty-nine".